Correct answers - "ALB + ECS & API Gateway + Lambda" : ECS is a Docker container management
platform and when used with a load balancer such as ALB, it helps provide a REST API that's
scalable and load balanced. API Gateway and Lambda help achieve the same purpose integrating
some capabilities such as authentication in a serverless fashion, with fully scalable
architectures.
Incorrect:
"SES + S3" - The combination of these provide email and object storage services
"CloudWatch + CloudFront" - The combination of these provide monitoring and fast content delivery
network (CDN) services
"EBS + RDS" - The combination of these provide elastic block storage and database services